1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
#!/usr/bin/env tarantool
if #arg == 0 then
require('utils').selfrun(arg, {
{
arg = {
1, -- hotloop (arg[1])
1, -- trigger (arg[2])
},
res = 'OK',
msg = 'Trace is aborted',
},
{
arg = {
1, -- hotloop (arg[1])
2, -- trigger (arg[2])
},
res = 'JIT mode change is detected while executing the trace',
msg = 'Trace is recorded',
},
})
end
local cfg = {
hotloop = arg[1] or 1,
trigger = arg[2] or 1,
}
local ffi = require('ffi')
local ffiflush = ffi.load('libflush')
ffi.cdef('void flush(struct flush *state, int i)')
-- Save the current coroutine and set the value to trigger
-- <flush> call the Lua routine instead of C implementation.
local flush = require('libflush')(cfg.trigger)
-- Depending on trigger and hotloop values the following contexts
-- are possible:
-- * if trigger <= hotloop -> trace recording is aborted
-- * if trigger > hotloop -> trace is recorded but execution
-- leads to panic
jit.opt.start("3", string.format("hotloop=%d", cfg.hotloop))
for i = 0, cfg.trigger + cfg.hotloop do
ffiflush.flush(flush, i)
end
-- Panic didn't occur earlier.
print('OK')
|
